PRODUCTION METHOD FOR SEED CRYSTAL USED IN PRODUCTION OF HYDROGEN-REDUCED NICKEL POWDER

Title:

PRODUCTION METHOD FOR SEED CRYSTAL USED IN PRODUCTION OF HYDROGEN-REDUCED NICKEL POWDER

Document Type and Number:

WIPO Patent Application WO/2015/122315

Kind Code:

A1

Abstract:

Provided are: a production method for a nickel seed crystal that, by the optimization of the amount of hydrazine added when using to hydrazine to manufacture a seed-crystal fine nickel powder, reduces production costs and the environmental burden of nickel powder production, and maintains and improves the quality of the nickel powder at a low cost; and a production method for nickel powder using the nickel seed crystals. The production method for a seed crystal used in the production of hydrogen-reduced nickel powder is characterized in that the seed crystal is generated by 1-1.25 mol. inclusive of hydrazine being added to an acidic solution, which contains nickel ions and has a temperature maintained at 50-60℃ inclusive, per 1 mol. of a nickel component contained in the acidic solution.

Inventors:

YONEYAMA TOMOAKI (JP)
HEGURI SHIN-ICHI (JP)
OHARA HIDEKI (JP)
IKEDA OSAMU (JP)
KUDO YOHEI (JP)

Application Number:

PCT/JP2015/052908

Publication Date:

August 20, 2015

Filing Date:

February 03, 2015

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

B22F9/24; B22F9/26

Domestic Patent References:

WO2012114637A1	2012-08-30
WO2008001741A1	2008-01-03

Foreign References:

JP2013014813A	2013-01-24
JP2013221192A	2013-10-28
JPH09227908A	1997-09-02

Other References: